Unfortunately we are unable to reproduce the problem at our side. Can you please try with this demo: http://demos.telerik.com/aspnet-ajax/grid/examples/programming/draganddrop/defaultcs.aspx
to see if right click on column headers which shows advanced options can be advance verified by the nub - it works at our side.
If the above also works for you, can you please send us a sample or url to the site where you experience the problem, so we can investigate further?
the Telerik team
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